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Add support for llvm.vectorizer metadata

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- llvm.loop.parallel metadata has been renamed to llvm.loop to be more generic
  by making the root of additional loop metadata.
  - Loop::isAnnotatedParallel now looks for llvm.loop and associated
    llvm.mem.parallel_loop_access
  - document llvm.loop and update llvm.mem.parallel_loop_access
- add support for llvm.vectorizer.width and llvm.vectorizer.unroll
  - document llvm.vectorizer.* metadata
  - add utility class LoopVectorizerHints for getting/setting loop metadata
  - use llvm.vectorizer.width=1 to indicate already vectorized instead of
    already_vectorized
- update existing tests that used llvm.loop.parallel and
  llvm.vectorizer.already_vectorized

Reviewed by: Nadav Rotem


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182802 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Paul Redmond
2013-05-28 20:00:34 +00:00
parent a32edcfbc5
commit ee21b6f7b4
10 changed files with 381 additions and 88 deletions
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test/Transforms/LoopVectorize/vectorize-once.ll
+9 -5
View File
@@ -11,7 +11,7 @@ target triple = "x86_64-apple-macosx10.8.0"
; This test checks that we add metadata to vectorized loops
; CHECK: _Z4foo1Pii
; CHECK: <4 x i32>
; CHECK: llvm.vectorizer.already_vectorized
; CHECK: llvm.loop
; CHECK: ret
; This test comes from the loop:
@@ -40,10 +40,10 @@ _ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %for.body.i, %entry
ret i32 %__init.addr.0.lcssa.i
}
; This test checks that we don't vectorize loops that are marked with the "already vectorized" metadata.
; This test checks that we don't vectorize loops that are marked with the "width" == 1 metadata.
; CHECK: _Z4foo2Pii
; CHECK-NOT: <4 x i32>
; CHECK: llvm.vectorizer.already_vectorized
; CHECK: llvm.loop
; CHECK: ret
define i32 @_Z4foo2Pii(i32* %A, i32 %n) #0 {
entry:
@@ -59,7 +59,7 @@ for.body.i: ; preds = %entry, %for.body.i
%add.i = add nsw i32 %0, %__init.addr.05.i
%incdec.ptr.i = getelementptr inbounds i32* %__first.addr.04.i, i64 1
%cmp.i = icmp eq i32* %incdec.ptr.i, %add.ptr
br i1 %cmp.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i, !llvm.vectorizer.already_vectorized !3
br i1 %cmp.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i, !llvm.loop !0
_ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %for.body.i, %entry
%__init.addr.0.lcssa.i = phi i32 [ 0, %entry ], [ %add.i, %for.body.i ]
@@ -68,5 +68,9 @@ _ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %for.body.i, %entry
attributes #0 = { nounwind readonly ssp uwtable "fp-contract-model"="standard" "no-frame-pointer-elim" "no-frame-pointer-elim-non-leaf" "realign-stack" "relocation-model"="pic" "ssp-buffers-size"="8" }
!3 = metadata !{}
; CHECK: !0 = metadata !{metadata !0, metadata !1}
; CHECK: !1 = metadata !{metadata !"llvm.vectorizer.width", i32 1}
; CHECK: !2 = metadata !{metadata !2, metadata !1}
!0 = metadata !{metadata !0, metadata !1}
!1 = metadata !{metadata !"llvm.vectorizer.width", i32 1}